For a large, global rollout, conducting Train-the-Trainer sessions is the most effective approach. Here’s why:

Scalability and Localization: Train-the-Trainer sessions prepare local trainers who can then provide tailored training to their respective regions. This approach ensures that training is scalable and adaptable to the specific needs of each location.

Global Consistency: By training designated trainers, CK can ensure consistency in the information being conveyed while allowing for localization of the training material where needed.

Salesforce Best Practices: For large, distributed organizations, Salesforce recommends the Train-the-Trainer model to ensure broad coverage and effective communication across global teams.

Salesforce’s documentation on User Training and Change Management describes the Train-the-Trainer model as a recommended strategy for large-scale implementations.

In summary, conducting Train-the-Trainer sessions (Option B) is the best approach to ensure effective training across CK ' s global organization.